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<script>
    // 题目4: 写一个函数 parseQueryString，它的用途是把 URL 参数解析为一个对象
    // 函数名：parseQueryString
    // 参数：URL字符串
    // 返回值：URL字符串解析后的对象
    // 例如：parseQueryString("admin=user&pass=1234") 返回 { admin: "user", pass: "1234" }
    function parseQueryString(URL) {
        let str = URL.split("&");
        let json = {};
        let str1 = "";
        for (let i = 0; i < str.length; i++) {
            str1 = str[i].split("=");
            for (let j = 0; j < str1.length; j = j + 2) {
                json[str1[j]] = str1[j + 1];
            }
            str1 = "";
        }
        return JSON.stringify(json);
    }
    console.log(parseQueryString("admin=user&pass=1234"));
</script>